G rated tire PSI

[Rick]

iI have searched the forum and not found a specific answer. Do you inflate the G rated tires to 110 PSI cold. All four of my tires came from the dealer inflated to 80 so I assumed that was correct.

Thanks

Rick

[Dave&Ginny]

Yes you should inflate to 110 for max carry cap and the best wear.

[johnboytoo]

And the harshest ride

BUT, the best thing is to weigh your TV nd RV on a cat scale to see what the "REAL" weight on your trailer tires are and then you know if you need max carrying capacity or not...

[Rick]

I went on the CAT scale and obtained some weights that I am trying to sort out. 2011 F350 Diesel Dually

Truck only
Front 5300
Rear 4500
Gross 9800

Truck with Trailer (2013 36 RW RL)
Front 5380
Rear 8320
Trailer 27240

Trailer completely empty 14266. Went on the CAT site and it is telling me that I am over weight on the tow vehicle.

Would appreciate some opinions on my weights. This was fully loaded including water. We are full timing so I want to insure I am safe.

Thanks

Rick

[Rick]

Specifically the report is stating that I am exceeding my truck GVw by 400 lbs and the truck GCW by 6740.
Somehow I am finding this hard to believe and wonder if I have a wrong number in the wrong place. But I double checked my numbers.

I also have a 35 gallon auxilary fule tank that was full for weighing. I am within spec on all of my other critical numbers. Truck front axle, truck rear axle, hitch tow GTW, kingpin and trailer GVW.

Rick

[RifRaff]

There is a page that covers your truck and the trailer weight. It is in trailer life. Check it out. Found my answers.

[Diesel chaser]

Rick, if I am reading your #'s correct it appears that you have added 13,000 pounds to your trailer. Is the 27,240 your trailer or your combined weight? Also look at the decal on the drivers door post , ie lists max axel weights for your tow rig.

[Rick]

My truck weight alone was 9800 lbs. Truck and trailer was 27240. Making the trailer 27240 less 9800 for a total of 17440. Trailer came in delivered dry at 14266. So I have added 3174. Gross towing trailer weight is 18,000 per label on the pin leaving me 560 under weight.

But the CAT scale formula is telling me I am 6740 over on the truck GCW.

This is not making sense to me.

Rick

[Rick]

My max axle weights from the door post are 5940 front and 9000 rear. CAT scale readings are 5380 front and 8320 rear. Again I am under weight based on these readings.

[Rick]

My wrong number was GCWR. I went to listings as suggested and found my weight to be 30,000. That changed everything and places me within specifications for all categories.

thanks for helping me work through this. Now I think I will go and inflate my tires to 110 tomorrow morning.

[atom ant]

Rick you have me worried! 27 would be one heavy trailer!

The number I can't see is what was on your trailer axles themselves. That weight will give you an idea of what to do on tire pressure. 110 psi gives you the full 3,750 lbs capacity, and Goodyear has an inflation chart the lets you reduce pressure all the way down to 80 psi at 3,000 lbs. With the weights you are running (similar to mine) I would keep them at 110 psi without a doubt.

It's possible the Dealer didn't even look at the tire and inflated them to 80 psi just like all the other E tires they work on.

[rcflame]

Rick, A few discrepancies with your weight figures. First the 18,000 lb. figure on your pin box, is just the max weight your pin box can handle. It has nothing to do with the gross vehicle weight rating of your trailer. I have a 2012 RW 36RL, and the gvwr is 16,000. Their should be a couple labels on the left side of the trailer toward the front. Mine are between the propane door and the basement door. These will give you the GVWR, the axle rating, and the tire specs for the tires that originally came with the trailer. As to your weights, if the truck was loaded the same when you weighed it by itself as when you weighed it with the trailer, you have a pin weight of 3900 lbs. which is the difference in truck weight solo and with trailer. If you take the truck weight by itself from the total weight, your trailer weights 17,440 total. Which if your actual GVWR is the same as mine, you are 1,440 lbs. overweight. If you take your pin weight from your total trailer weight, you have 13,540 lbs. on your axles. My TV is a Chevy 3500 dually, so I don't know off hand what your truck figures are. I will give you my figures for comparison. The trailer weights are for for when I hit the road, but I start with a little water in my fresh water tank, but not full, and the holding tanks empty. Truck solo, Front AXle 4660, Rear Axle 4340, total 9000. With trailer, Front Axle 4740, Reart Axle, 7400, Trailer axles 12020, for Gross Combined, 24160. Breaking this down, I have a pin weight of 3140 lbs. axle weight of 12020, for trailer GVW of 15,140. Edited by: rcflame

[Dave&Ginny]

My rig weighs a total of 26,500 lbs. That's with a 2012 F350 dually 4x4 with an extra 35 gallon fuel tank filled. The trailer is a 2012 RL with a slide-in- slide, generator, washer/dryer. My trailer GVW is 16,600 and when I weighed I had 1/3 tank of fresh water and 1/3 tank of black. I'm still under max by a long shot.

[Rick]

Thanks for the heads up on the incorrect Trailer GVWR. I readjusted to the 16,500 as found on the port side of the trailer. With that info I am in fact 940 over weight on my Trailer GVW. My 2013 36 RL has the generator, washer dryer and quartz and was delivered dry at 14266 leaving me with 2234 for personal belongings. When I weighed I wanted to make sure I had a worse case situation. I scaled full water (100 gallons) and full fuel (both tanks). I also had 4 cases of Coors Light and 4 Cases of soda and 2 full cases of water left over from our going away party.

Any way here are my final numbers. If you see anything that doesn't add up let me know. I entered all of this information into the CAT site to receive a CAT truck and trailer weight safety report.

SECTION A
Truck certification Ratings:
2011 F 350 Dually King Ranch Diesel
Front axle 5940
Rear axle 9000
GVWR 13300
GCWR 30000

5th wheel hitch rating:
GTWR 18,000
Maximum vertical load king pin 4500

Trailer GVWR 16,500



SECTION B
Truck with Trailer Attached
Front axle 5380
Rear Asle 8320
Total Trailer Axle weight 13540

Truck W/O trailer attached
Front Axle 5300
Rear Axle 4500

Section C Report:
Truck with attached trailer weight 13700
Truck weight 9800
Vertical load Kingpin 3900
Trailer gross weight 17440
Truck and trailer combined weight 27240
Vertical load Kingpin % 22%

Safety Margin vs. Over load
Truck Front axle 560 under
Truck rear axle 680 under
Truck GVW 400 over
Truck GCW 2700 under
Hitch tow GTW 560 under
Vertical load kingpin 600 under
Trailer GVW 940 over

I figure if I cut back on my water significantly and reduce my case products beer/soda and water I should be in pretty good shape. Heavy yes but I think manageable. I did inflate tires to 100 lbs each this afternoon.

Rick

[Dave&Ginny]

Originally Posted by Rick

Thanks for the heads up on the incorrect Trailer GVWR. I readjusted to the 16,500 as found on the port side of the trailer. With that info I am in fact 940 over weight on my Trailer GVW. My 2013 36 RL has the generator, washer dryer and quartz and was delivered dry at 14266 leaving me with 2234 for personal belongings. When I weighed I wanted to make sure I had a worse case situation. I scaled full water (100 gallons) and full fuel (both tanks). I also had 4 cases of Coors Light and 4 Cases of soda and 2 full cases of water left over from our going away party.

Any way here are my final numbers. If you see anything that doesn't add up let me know. I entered all of this information into the CAT site to receive a CAT truck and trailer weight safety report.

SECTION A
Truck certification Ratings:
2011 F 350 Dually King Ranch Diesel
Front axle 5940
Rear axle 9000
GVWR 13300
GCWR 30000

5th wheel hitch rating:
GTWR 18,000
Maximum vertical load king pin 4500

Trailer GVWR 16,500



SECTION B
Truck with Trailer Attached
Front axle 5380
Rear Asle 8320
Total Trailer Axle weight 13540

Truck W/O trailer attached
Front Axle 5300
Rear Axle 4500

Section C Report:
Truck with attached trailer weight 13700
Truck weight 9800
Vertical load Kingpin 3900
Trailer gross weight 17440
Truck and trailer combined weight 27240
Vertical load Kingpin % 22%

Safety Margin vs. Over load
Truck Front axle 560 under
Truck rear axle 680 under
Truck GVW 400 over
Truck GCW 2700 under
Hitch tow GTW 560 under
Vertical load kingpin 600 under
Trailer GVW 940 over

I figure if I cut back on my water significantly and reduce my case products beer/soda and water I should be in pretty good shape. Heavy yes but I think manageable. I did inflate tires to 100 lbs each this afternoon.

Rick

Your rig is roughly 750 lbs heavier than mine. You have the Quartz counter tops but I find it hard to believe that they weigh that much more. Besides, I have a slide-in-slide, do you?

I might have to recheck my scale ticket tomorrow.

[Rick]

I do not have the slide in slide. This also included our two bikes at 35 lbs each plus the actual hitch weight on the back of the Redwood. I estimate the quartz covers we left behind to be 60 to 75 lbs. I think the quartz is pretty heavy.

[0nTheRoad]

[0nTheRoad]

I entered all of this information into the CAT site to receive a CAT truck and trailer weight safety report.</span>


</span>
Rick, what is the site you used to enter and calculate your weights?</span>

[johnboytoo]

I would guess the normal cat scale site...http://catscale.com/

[rcflame]

I couldn't find it on the Cat site, but here is a calculator that is similar: http://fifthwheelst.com/worksheet-1.htm. However, a person can figure it out on their own very easily.
At 8 1/3 lbs. per gallon you could significantly reduce your weight by less water in the tank. Reducing the beer (don't get too carried away), soda and bottled water would help also. By doing a little here and there, you should be able to get within GVRW without too much trouble.